What's wrong with this motor? Help needed....


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Old 04-17-18, 01:01 PM
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What's wrong with this motor? Help needed....

This is a Dayton split phase motor, 1/3hp

Motor will not start, no burned smell, shaft turns freely, age is 3.5 years, will not run after bypassing switch, No hum with power on. Resistance readings: 1.2, .3, .3
 
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Last edited by Gunguy45; 04-17-18 at 01:08 PM. Reason: No edit, but moved to this Forum from Lighting
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Old 04-17-18, 01:37 PM
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Does the motor have a starting capacitor?
 
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Old 04-17-18, 01:50 PM
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Ohm the motor and see what you get.
 
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Old 04-17-18, 02:06 PM
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Very basic motor. No start cap. Just a centrifugal switch.

Remove red and black wires.
Check between the red and black wires for resistance. (start winding)
Check between the binding post for resistance. (run winding)

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If either winding was open or the centrifugal switch was bad... you'd get a hum when connecting the motor. My guess a power to the motor issue.
 
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Old 04-17-18, 04:19 PM
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No it does not have a capacitor
 
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Old 04-17-18, 04:27 PM
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Red wire to black wire 2.8
then 1.8 and .3 on the 200ohm scale, but I just checked my meter and it shows .3 on the leads?
 
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Old 04-17-18, 05:31 PM
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The ratio 2.8 for start and 1.8 for run looks about right.
You'd need to use the lowest ohm setting available.

Since both windings are showing continuity..... you will need to check your application for 120vac. It sounds like you are not getting any voltage to the motor.
 
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Old 04-17-18, 05:52 PM
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It is not a power problem, removed switch from motor & tied motor directly into power
 
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Old 04-17-18, 06:18 PM
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Did you check for 120vac on the motor connection terminals ?
 
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Old 04-17-18, 07:20 PM
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It wasn't at the motor connection, it was the power cord, wire broken almost totally into. I should have measured voltage at the terminals! Thanks everyone...
 
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Old 04-17-18, 08:45 PM
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The ol broken power cord.
 
 

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